WCAG 2.0 itself is a stable document that does not change. This Techniques for WCAG 2.0 document is updated periodically, about twice per year, to cover more current best practices and changes in technologies and tools.

Techniques are informative—that means they are not required. The basis for determining conformance to WCAG 2.0 is the success criteria from the WCAG 2.0 standard—not the techniques..

Note: W3C cautions against requiring W3C's sufficient techniques. The only thing that should be required is meeting the WCAG 2.0 success criteria. To learn more, see:

Techniques for WCAG 2.0 is not intended to be used as a stand-alone document. Instead, it is expected that content authors will usually use How to Meet WCAG 2.0: A customizable quick reference to read the WCAG success criteria, and follow links from there to specific topics in Understanding WCAG 2.0 and to specific techniques.

Publication of techniques for a specific technology does not imply that the technology can be used in all situations to create content that meets WCAG 2.0 success criteria and conformance requirements. Developers need to be aware of the limitations of specific technologies and provide content in a way that is accessible to people with disabilities.